Incorporation of Rainfall Rates from Land and Shipboard Based Radars in Mesoscale Data Analysis and Initialization Schemes
Abstract
LONG TERM GOALS: To obtain high resolution initial conditions in coastal regions for the Navy s NORAPS and COAMPS models from shipboard radar observations. OBJECTIVES: To develop a numerical scheme to incorporate meteorological parameters such as rainfall rates from shipboard and land based radars into data initialization and analysis schemes of NORAPS and COAMPS. This work is supported by ONR Marine Meteorology. APPROACH: The SPY-1 radar currently is not programmed to observe weather, but is restricted to military targets, and the data are classified. Martin Marietta is planning to determine the operational feasibility of using the Navy s SPY-1 radars for providing meteorological parameters in real-time operations. This does not involve developing techniques to fuse the data into the Navy s data analyses and initialization systems.. These systems are used to generate data sets that can be used as initial conditions by prognostic numerical models and as input for diagnostic models. Since NOAA's Nexrad and the Navy s Spy-1 are similar in their characteristics for meteorological purposes, initially we use data from nexrad to develop techniques to fuse radar data from into the Navy s mesoscale analysis systems. Once these systems are successfully developed, they will be tested with SPY-1 radar products using shipboard analysis systems developed for nested version of COAMPS. For the coarse networks, cumulus parameterization inversion techniques will be used to specify diabatic heat sources at various levels. For the fine grid network, rainfall rates from observations are compared with model produced rates. Difference between these two rates are converted into heating rates and will be used to force the model to accept the observed rates for two to three hours to create the divergence fields appropriate to the observed precipitation rates.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 1997
- Accession Number
- ADA637245
Entities
People
- Rangarao V. Madala
Organizations
- United States Naval Research Laboratory